Pumping machinery



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R B T S O P M m d 0, M 0 m PUMPING MACHINERY.

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PATENT EEICE.

PUZMPINGQMACHINERIY.

SPECIFICATION forming part of Letters Patent No. 517,449, dated April 3,1894.

Application filed January 2, 1892. Serial No. 416,900- (No model.)

T0 aZZ whom it may concern:

Be it known that I, MORRISON FOSTER, of l the borough of Sewickley, inthe county of Allegheny and State of Pennsylvania, have lnvented a newand useful Improvement in Pumping Machinery, of which the following s afull, clear, and exact description, refer- I :gpce being had to theaccompanying drawings,

arming part of this specification, in which Figure 1 represents a sideelevation, and 1g. 2 a vertical longitudinal section of a pumponstructed on my new plan.

w Like symbols of reference indicate like 7 parts in each.

My invention relates to machinery or pumps for elevating water or otherliquids. Two vertical tubular "pump plungers and working Ehambers areused, the plungers rising and falling alternately, and the object of myinvention is to utilize the weight of the water or liquid in the onecolumn as a counterpoise to the weight of liquid in the other column,and to thereby reduce to the minimum the amount of power necessary toraise a given quantity of liquid to a higher'level.

In the drawings the upright parts of the pump are shown broken, as theywill necessarily be constructed of variable lengths according to theheight the liquid is to be ele- Vated.

I will now proceed to describe my invention so that others skilled inthe art can make and use the same. The pump is constructed of iron orother suitable material.

In the accompanying drawings A and B represent two vertical hollowplungers having hollow stems A B of smaller diameter. These are hung ateither end of a cross-arm or rocking beam 0, which is pivoted at thecenter upon a working journal at the bearing of which is a stud fixed toa stationary stand-pipe D. The cross arm 0 is in this case bent at anangle of about seventy degrees. The stand pipe D rests upon andcommunicates at its lower end with the cross-pipe b and being closed atthe top acts also as a fixed air chamber for regulating the action ofthe pump.

E and F are the working chambers of the pump, in which the plungers A--Bwork. These working chambers are connected by horizontal cross-pipes 6*0 which are in turn connected by a perpendicular pipe cZ.

G and H are extension rods connected at top with the working journals e,f, at either end of the cross-arm or rocking beam 0 and at bottom withthe working journals 9, h on the hollow stems A B of the plungers A, B.These extension rods cause the plungers to work up and down when G isoperated by power applied to the handle I.

2', j, are check valves in the hollow plungers A. 13., smaller in areathan the inside of the plungers. Ball valves are shown in the drawings.in, Z, are beveled stoppers or valves which fit in the .chamfered endsof the hollow plungers A, B; closing the latter respectively when eitherdescends below cross-pipe 17. These stoppers are preferably of same areaas that of the hollow plungers. The stoppers 70, Z, are fixed to thetops of stems m, 'n, which work perpendicularly in the chambers E, F,through holes in the bottom of cross-pipe o.

o, p, are heads upon the lower ends of the stems m, n, to prevent themfrom passing upward beyond the bottomsof the chambers E. F.

s, s, are spiral springs attached to the stop pers Z0, Z, to aid inraising them as the plungers A B, alternatelyrecede from them.

J is a supply valve through which the liquid to be elevated is admittedto the pump chambers.

t, u, are recessesinto which the stems m, n, sink when the stoppers is,Z, are depressed by the plungers A. B.

K is a cross-pipe attached to top of standpipe D (but not communicatingtherewith) having right angle extensions or branches '0, w, dependingfrom either end of it; and an orifice w through which the elevatedwater. or liquid escapes. Into these depending pipes 12, w, the upperends of the hollow stems A B of the plungers work'and by '0, w, areguided vertically.

The operation of these devices is as follows: The working chambers ofthe pump are placed in the water or liquid to be elevated so that thevalve J shall be well. below the surface or indeed the cross-pipe b maybe below the sur face. Hollow plunger A being at bottom of chamber E andplunger B at top of chamber F the handle I is depressed which causes theplunger A to rise and plunger B to move downward. I wish it to beobserved that at this stage of operations plunger A rises much fasterthan plunger 13 falls. When plunger A has risen about two thirds of theway plunger B has fallen only about one third of the way. From thispoint plunger A rises more slowly than it did and plunger B descendsmore rapidly than it did so that when the bottom of plunger A' hasreached the top of its course plunger Bis at the bottom of chamber F. Inthis and the manner of its accomplishment consists one of the featuresof my invention. The radius on which the journal pins 6 and f move atthe lower part of their course is nearly on the perpendicular plane onwhich the plunger stems A B move while at the upperpart of their courseit inclines rapidly away from that plane toward the central stand pipeD. The plungers A and 13 therefore move vertically much faster at thelower part of their course than at the upper part of it, whetherascending or descending. The suction produced by plunger A in risingcauses the main valve J to open and the small valve j in plunger B toshut, the small valve i being already shut, and followed closely by thestopper 7a. A supply of liquid rushes in through valve J to fill thevacuum caused by the suction of plunger A. The stopper it rises with theplunger A until the former has reached the lower side ofthe cross-pipe bwhen it is prevented from rising farther by the head, 0, on the lowerend of the stem m. Plunger A continues to rise, but slowly now, and thedescending plunger B having reached the stopper I (which closes up thelower end of B) falls rapidly; valve J shuts and valve t' opens. Thepressure of plunger B in its descent forces the liquid by way of pipesc, d, and I), up through valve i, the hollow plunger A and the hollowstem A As plunger 13 is now descending faster than A is rising,

. the pressure causes the surplus liquid to find exit at the top of thehollow stem A by way of the depending pipe 0 into the cross-pipe Byraising the K and out at the orifice 0.

handle I the operation is reversed. Plunger B rises drawing in moreliquid through valve J. Stopper Z rises to lower side of cross-pipe b.Plunger A descends, valve 7. shuts, stop: per closes the opens, andaided by the weight of liquid in A and A another quantity of liquid isforced by A out by way of pipes 0, cl, and b, valve j, hollow stem Bpipes w and K and orifice 0c. The flow of liquid continues froma: aslong as the handle I is operated.

It is not essential to use hollow sucker rods A b in order to operatethis system of pumping liquids. It can be accomplished also by carryingthe working chambers E. F. up above the full stroke of the tops of theplungers A. B. thence by a side extension pipe attached rigidly at topto cross pipe K and communieating therewith, conveying the elevatedliquid to K; and operating the plungers through holes in the caps of theworking chambers by means of ordinary solid sucker rods forked at thelower end where they attach to the plungers A. 13. so that the liquidmay pass freely through the hollow plungers and out at the upper part ofthe working chambers.

I claim as my invention- In a pump, the combination, with twocommunicating cylinders, of valved plungers reciprocating therein,valves in said cylinders constructed to close the ports in said plungerswhen engaged thereby, moving and limiting devices applied to said valveswhereby they engage the plnngers and move with the same during part oftheir stroke, all substantially as described, whereby each plunger actsduring such portion of its stroke as aforcing plunger to force liquidthrough the other plunger.

MORRISON FOSTER.

Witnesses:

J os. P. RANKIN, P. P. KNAPP.

month of plunger A, valve Correction in Letters Patent 'No. 517,449,

It is hereby certified that in Letters Patent N 0. 517,449, grantedApril 3, 1894, upon the application of Morrison Foster, of Sewiekley,Pennsylvania, for an improvement in Pumping Machinery,?

and that the said Letters Patent should be read with this correctiontherein that the JNO. M. REYNOLDS,

- Assistant Secretary of the Interior. Gouutersigned JOHN S. SEY OUR,

Commissioner of Patents.

